Manufacture of shingles



Oct. 25, 1960 D. M. RlPPE MANUFACTURE oF SHINGLES Filedl July 1o, 1957 7 Sheets-Sheet 1 Oct. 25, 1960 n. M. RIPPE MANUFACTURE oF sHINGLEs 7 Sheets-Sheet 2 Filed July 1o, 1957 Oct. 25, 1960 n. M. RlPPE 2,957,438

MANUFACTURE OF SHINGLES 7 Sheets-Sheet I5 Filed July l0, 1957 Oct. 25, 1960 D. M. RIPPE MANUFACTURE oF sHINGLEs '7 Sheets-Sheet 4 Filed July 1Q, 1957 Oct. 25, 1960 Filed July 10, 1957 D. M. RIPPE MANUFACTURE OF SHINGLES 7 Sheets-Sheet 5 Effi,

Oct. 25, 1960 D. M. RIPPE 2,957,438

MANUFACTURE OF SHINGLES Filed July 10, 1957 7 Sheets-Sheet 7 f I L; J z. rae @leggi/T311@ -j- 257 2,957,438 MANUFACTURE F SHINGLES `Dondeville M. Rippe, Webster Groves, Mo., assignor to Dondevlle Products Co., Inc., Webster Groves, Mo., a corporation of MissouriV Filed July 1o, 1951, ser. No. 670,969 `1o claims. (ci. 11s- 1) This invention relates to the manufacture of shingles, and more particularly to a machine for making shingles (either rooting or siding shingles) of sheet metal, such as aluminum.

Among the several objects of the invention may be noted the provision of a machine for making rectangular sheet metal shingles of a type having hook members at top and bottom and both ends from a continuous sheet metal strip; the provision of a machine of this class which is particularly adapted for the manufacture of shingles of the type shown in my copending` application for Shingle, Serial No. 578,101, filed April 13, 1956, issued as Patent 2,830,546, April 15, 1958; and the provision of a machine, of this class which is reliable in operation `and capable of economically producing shingles in quantity. Other objects and features will be in part apparent and in part pointed out hereinafter.

The invention accordingly comprises the constructions hereinafter described, the scope of the invention being indicated in the following claims.

In the accompanying drawings, in which one of various possible embodiments of the invention is illustrated,

Fig. 1 is a view in elevation of the right side of a machine of this invention;

Fig. 2 is a plan view of a sheet metal strip illustrating the operations performed thereon by the machine;

Figs. 3, 4 and 5 are cross sections taken on lines 3--3, 4-4 and 5-5, respectively, of Fig. 2;

Fig. 6 is an enlarged vertical section taken on line 6*-6 of Fig. 1;

F Fig. 7 is a horizontal section taken on line 7-7 of Fig. 8 is an enlarged vertical section taken on line 8-8 of Fig. 1;

Fig. 9 is a view in cross section on line 9-9 of Fig. 6 nd illlustrates a moved position of parts in relation to Fig. 10 is a vertical longitudinal section taken on line 1t-1tl of Fig. 8, with parts broken away;

Fig. 1.1 is an enlarged vertical transverse section taken on line 11-11 of Fig. l;

Fig. 12 is an enlarged vertical transverse section taken on line 12-12 of Fig. 1;

Fig. 13 is a vertical longitudinal section taken on line 1313 of Fig. 12;

Fig. 14 is a view corresponding to Fig. 13 showing a moved position of parts;

Fig. 15 is a horizontal section taken on line 15-15 of Fig. 12;

Fig. 16 is a cross section of a bending unit taken on line 16-16 of Fig. 17;

Fig. 17 is an enlarged vertical transverse section taken on line 17-17 of Fig. 1;

Fig. 18 is a view similar to Fig. 16 showing a moved position of parts;

Fig. 19 is a fragmentary 19-19 of Fig. 1; and,

horizontal view taken on line arent Fig. 20 is a view in elevation taken on line 20-20 of Fig. 19.

Corresponding reference characters indicate corresponding parts throughout the several views of. the drawings.

Referring to the drawings, a machine of this invention is shown to comprise vertical side plates 1 and 3 which extend parallel to one another and which are spaced apart a distance greater than the width of sheet metal strip S which is to be converted into shingles. This strip S cornes from a roll of strip which is not shown in the drawings, but which would be olf to the left of Fig. 1. The strip travels through the machine from left to right as viewed in Fig. l. Side plate 1 is the lefthand plate and side plate 3 is the right-hand plate as viewed looking forward in the direction of travel of the strips.

In Figs. 1 and 2, there are indicated stations 1-6 which are spaced longitudinally of the machine at intervals corresponding to the total height of one shingle blank, i.e.,

Vthe height of a finished shingle plus the widths of the top and bottom hook members of the shingle. The strip S extends forward through the machine all the way to station 6. The width of the strip corresponds to the total length of one shingle blan i.e., the length of a finished shingle plus the widths of the end hook members of the shingle.

At 5 in Fig. 1 is indicated a combination punch press and strip-feeding unit which is operative at station 1 to punch a V-shaped notch 7 in the left side margin of the strip S, to form a series of indentations 9 (corresponding to the indentations 15 shown in myl aboveementioned copending application) extending transversely across the strip on a line which is located somewhat rearward of a transverse line through the apex of the notch 7; to punch notches 11 and 13 in the right side margin of the strip, these notches defining a tab 15; and to punch a hole 17 in the tab 15. Having performed these punching operations at station 1, the unit 5 moves forward to station 2 (see Fig. 9), carrying with it the strip S and thereby feeding forward a length of strip S corresponding to one shingle height. Then it releases its grip on the strip, and returns to station 1 to repeat the punching operations.

From the above, it will be apparent that during the intervals between the forward feeding operations of unit 5, there will be a portion of the strip S extending from station 1 to station'6 having the notches 7, 13 and 15, indentations 9 and tabs 15 with holes 17 therein at station intervals (see Fig. 2). During each of these intervals the following operations are also taking place: Between stations 3 and 4, a bending unit 19 (see Figs. 1, 8 and 10) operates to bend down the portion 21 of the strip at the left side of the strip between the notches 7 at stations 3 and 4 and to bend up the portion 23 of the strip at the right side of the stripr between the notch 13` a-t station 3 and the notch 11 at station 4 (see Figs. 2 and 3). The tab 15 is not bent. The portion of the strip between stations 4 and 5 will already have the bent-down portion 21 and the bentup portion 23 as a result of the previous cycle of operation of bending unit 19. Between stations 4 and 5, a bending unit 25 (see Figs. 1, 10 and 11) operates t-o bend the portion 21 under the strip and to bend the portion 23 over the strip (see Figs. 2 and- 4) whereby these portions become end hook members 21 and 23. At station 5, a cutting and bending unit 27 (see Figs. l and 13-15) operates to cut the strip on a transverse line which passes through the apex of V-notch 9 and to bend the rearward marginal portion of the cut-off blank down and around under the blank to form a bottom or butt hook member 29 (see Figs. 2 and 5). At station 6 a bending unit 31 (see Figs. 1 and 16-19) operates to bend the forward marginal end portion of the strip up and over the strip to form the top hook member 33 which has the indentations 9 therein (see Figs. 2 and 5). The tab 15 is also bent over and flattened down. This completes a shingle, and the completed shingle is automatically fed transversely out of the left side of the machine as will be made clear later.

The punch press and strip-feeding unit (see Figs. l, 6, 7 and 9), which is reciprocable longitudinally of the machine between stations 1 and 2, comprises a horizontal bed plate 45 supported on end blocks 47 which are slidable on ways 49 attached on the upper edges of side plates 1 and 3. The head of the press is constituted by a horizontal plate 51. Guide pins 53 extend up from the bed plate 45 adjacent the ends thereof through guide bushings 57 carried by the head plate 51. Secured to the bed plate 45 adjacent its ends are brackets 59. A horizontal shaft 61 spans the machine having its ends journalled in these brackets 59. Two bell cranks, each generally designated 63, 'are fixed on shaft 61, one adjacent each end of the shaft. Each bell crank has a rearwardly extending arm 65 and a downwardly extending arm 67. The rearward ends of rearwardly extending arms 65 of the bell cranks are connected to the head plate 51 for raising and lowering it upon oscillation of the cranks 63. For making this connection the arm 65 of each crank carries at its rearward end a pair of rollers 69 and 71. The head plate 51 has upwardly extending forward and rearward iianges 73 and 75. Adjacent each end of the head plate 51 there is a cap 77 which spans flanges 73 and 75. Below this cap on head plate 51 is a block 79. The roller 69 adjacent each end of the plate 51 is received between the respective cap 77 and block 79, and the roller 71 adjacent each end of the head plate 51 bears down on the respective block 79.

'Ihe head plate 51 carries a series of roundhead bolts 81 for making the indentations. The bed plate 45 carries a platen 83 having a series of holes 85 directly below the heads of bolts 81 and cooperable with the latter for forming the indentations. The head plate 51 carries dies such as indicated at 85 and 87 (see Fig. 6) cooperable with die formations such as indicated at 89 and 91 (see Fig. 7) on the bed plate 45 for cutting out the notches 7, 11 and 13. The bed plate 45 has openings 93 and 95 for disposal of the waste cutout portions of the sheet material.

Oscillation of the cranks 63 is effected by mechanism comprising a main transverse drive shaft 97 journalled side plates 1 and 3 (see Fig. l2). Each gear 103 meshes with an idler pinion 107. Each gear 107 has a crank pin 109 thereon. Connecting rods 111 connect crank pins 109 and the lower ends of bell crank arms 67. The arrangement is such that upon each revolution of gears 107, and each osci1lation of the connecting rods, with the unit 5 at station 1, the bell cranks 63 are rocked from the position designated A in Fig. 1 to the position designated B in Figs. l and 9 to drive down the head plate 51, then,

the entire unit 5 is pulled forward to station 2 (see Fig. 9), then the bell cranks are reversely rocked from position B to position A to lift the head plate 51, and then the unit 5 is pushed back to station 1.

The bending unit 19, which is illustrated in detail in Figs. 8 and l0, comprises a fixed lower path of the strip, and a fixed upper crossbar 115 (also a channel section bar) above the lower bar. The bending unit 25, which is illustrated in detail in Figs. l0 and ll, comprises a fixed lower crossbar 117 (shown as a channel section bar) extending transversely across the machine between stations 4 and 5 at the same level as crossbar 113, and a fixed upper crossbar 119 (also a channel section bar) above the lower bar at the same level as crossbar 115. Extending longitudinally of the machine adjacent its left side from station 3 substantially to station 4 is a fixed bar 121 which is secured on top of the lower crossbar 113. In line with bar 121 on crossbar 117 is a bar 122. Extending longitudinally of the machine adjacent its right side from station 3 to station 5 is a fixed bar 123 which .is secured to the bottom of the upper crossbar 115. In line with bar 123 on crossbar 117 is a bar 124.

Bars 121 and 123 are of somewhat less height than bars 122 and 124. A horizontal bending blade 125 is fixed to the top of bar 121 and a horizontal bending blade 127 is fixed to the bottom of bar 123. The top of bar 122 is at the same level as the top of blade 125, and the bottom of bar 124 is at the same level as the bottom of blade 127. Fixed to the upper crossbar of bending unit 19 and extending upward therefrom adjacent the left-hand side ofthe machine is a vertical air cylinder 129. This cylinder has a piston rod 131 extending downward through a hole 133 in the bar 115 from a piston (not illustrated) in the cylinder, the piston rod 131 having a movable bending blade 135 fixed to its lower end. The blade 135 is cooperable with the blade to bend downward the portion 21 of the strip S. A guide for the blade is indicated at 137. Fixed to the lower crossbar 113 and extending downward therefrom adjacent the right side of the machine is a vertical air cylinder 139. This cylinder has a piston rod 141 extending upward through a hole 143 in the bar 113 from a piston (not illustrated) in the cylinder, the piston rod 141 having a movable bending blade 145 like blade 135 fixed at its upper end. The blade 145 is cooperable with the blade 127 to bend upward the portion 23 of the strip S. A guide for the blade 145 is indicated at 147.

Directly at station 4 there is a fixed lower crossbar 149 extending transversely across the machine below the path of the strip, and a fixed upper crossbar 151 above the lower crossbar. Fixed to the upper crossbar and extending upward therefrom adjacent the left-hand side of the machine is a vertical air cylinder 153. This cylinder has a piston rod 155 extending down through a hole 157 in the bar 151 from a piston (not illustrated) in the cylinder. The piston rod has a strip-clamping bar 159 pivoted at its lower end, the strip-clamping bar extending longitudinally of the machine from station 3 to station 5 and being engageable with the top of blade 125 from station 3 to station 4 (see Fig, 8) and the top of the longitudinal bar 122 from station 4 to station 5 (see Fig. ll). Fixed to the lower crossbar 149 and extending upward therefrom adjacent the right-hand side of the machine is a vertical air cylinder 163. This cylinder has a piston rod extending up through a hole 167 in the bar 149 from a piston (not illustrated) in the cylinder. The piston rod 165 has a strip-clamping bar 169 pivoted at its upper end, this bar extending longitudinally of the machine from station 3 to station 5 and being engageable with the bottom of the blade 127 from station 3 to station 4 (see Fig. 8) and the bottom of the longitudinal bar 124 from station 4 to station 5 (see Fig. ll).

Fixed on the left side plate 1 of the machine and extending laterally outward therefrom between stations 4 and 5 is a horizontal air cylinder 171 (see Figs. l and l1). This cylinder has a piston rod 173 extending horizontally inward through a hole in the plate 1 from a piston not illustrated) in the cylinder, the piston rod 173 having a horizontal bending blade 177 fixed on its inner end. This blade 177 is movable inward under the bottom of the bar 159 to bend over the portion 21 of strip S.

Fixed on the right side plate 3 of the machine and extending laterally outward therefrom between stations 4 and 5 is a horizontal air cylinder 181 '(see Figs, l and l1). rl`his cylinder has a piston rod 183 extending hori- Lontally inward through a hole 185 in the plate 3 from a piston (not illustrated) in lthe cylinder, the piston rod 183 having a horizontal bending blade 187 fixed on its inner end. This blade 187 is movable inward over the top of the bar 169 to bend over the portion 23 of strip S.

The cutting and bending unit 27 (Figs. 1 and 12-15) comprises a pair of vertical guides 189 mounted on the inside of the side plates 1 and 3 at station 5 extending downward from the upper edges of the side plates. Vertically slidable in each of these vertical guides is a slider 191. The sliders extend down below the guides and each has a cam follower roller 193 at its lower end which is received in a cam groove 195 on the outside of the gear 103 on the respective side of the machine. Extending transversely across the machine between the two sliders 191 is a shear blade holding bar 196, the ends of which are welded to the sliders. Secured to this bar 196 is a cutting and bending blade 197. The blade 197 has a bottom surface 199 which angles upward in forward direction as related to the travel of the strip. The rearward bottom edge of the blade constitutes a shearing edge 201; the forward bottom edge constitutes a bending edge 203. The shearing edge 201 is cooperative with a xed shear blade 205 which extends transversely across the machine, being supported by a bar 207. The bending edge 203 is Cooperable with a fixed bending bar 209 which extends transversely across the machine, being supported by a bar 211. The fixed shear blade 205 and the fixed bending blade 209 have their upper surfaces at the level of the path of the strip. The development of the cam groove 195 is such that upon each revolution of the gears 103, the blade 197 is pulled down from the raised retracted position above the blades in which it is shown in Fig. 13 to the lowered position shown in Fig. 14 to shear the strip olf against the forward edge of blade 205 and to bend down the rearward portion of the cutoff portion of the strip around the rearward upper edge of the bending blade 209.

Pivoted at 213 on the inside of the side plates 1 and 3 of the machine at station 5 are rocker arms 215. Extending across the machine between these rocker arms is a bending bar 217, the ends of which are welded to the rocker arms. Each rocker arm carries a cam follower roller 219 received in a cam groove 221 on the inside of of the respective gear 103. The development of the cam groove 221 is such that upon each revolution of the gears 103 the bending bar 217 is rocked forward from the retracted position in which it is illustrated in Fig. 13 to the forward position in which it is illustrated in Fig, 14 to bend the portion of the strip previously bent downmby blade 197 forward under the blade 209 to make thesliingle butt hook 29.

The shear blade holding bar 196 carries a springbacked hold-down bar 223 which, upon downward movement of the blade holding bar 196, is adapted to clamp the strip material S down upon the bending blade 209. The hold-down bar 223 has vertical slots 225 therein which receive studs 227 projecting forward from the bar. Springs such as indicated at 229 reacting from a plate 2314 on Athe bar 196 bias the holddown ba r,223 down-` ward.

The bending unit 31 at station 6 (Figs. 1 and 16-19) comprises a xed lower crossbar 233 (shown as a channel section bar) which extends transversely across the machine at station 6 below the path of the strip. Between stations 5 and 6 there is a horizontal strip-supporting plate 235. Bearing lblocks such as indicated at 237 are mounted on the inside of the side plates 1 and 3 of the machine at station 6. Pivoted at 239 on the inside of these bearing blocks are rocker arms 241. These arms hang down from their pivots. Extending between these rocker arms is a bar 243. Secured to the bottom of this bar is a blending blade 245. This blade has a tapered forward edge portion which has notches 247 at locations corresponding to the locations of the indentations 9 made in the strip. Extending across the forward end of the machine between the side plates 1 and 3 is a vertical forward end plate 249 (see Fig. l). At 251 is indicated a bracket mounted on the outside of end plate 249. An air cylinder 253 has its outer end pivotally mounted in the bracket as indicated at 255 to be swingable on a horizontal axis, and extends rearward through a large opening 257 in the end plate. A piston rod 259 extends rearward from a piston (not illustrated) in cylinder 253 to a pivotal connection at 261 with the bar 243. The arrangement is such that when the piston rod is extended rearward from the cylinder, rocker arms 241 and the blade 245 occupy the raised retracted position illustrated in Fig. 16. When the piston rod isdrawn into the cylinder, the arms and blade swing down to the operative position shown in Fig. 18.

Cooperable with the blade 245 is a bending bar 263. This bar 263 extends transversely across the machine, having its ends secured to pivot members 265 which have pivot pins 267 offset from the bar journalled in the bearing blocks 237. Fixed on the right-hand pivot pin 267 is a pinion 269. In mesh with this pinion is a rack 271 which is slidable longitudinally of the machine in a channel-shaped guide 273 carried by the bar 233. A horizontal air cylinder 275 has one end fixed to the end plate 249 and extends outward therefrom. This cylinder has a piston rod 277 extending through an opening 279 in plate 249 from a piston (not illustrated) in the cylinder to a connection at 281 with the rack.

In the left side plate 1 of the machine extending from station 5 to station 6 at the level of the strip S is a horizontal exit slot 283. The left-hand pivot member 265 has a slot 284 which registers with slot 283 when members 265 and bending bar 263 are in the Fig. 16 position. When a shingle is completed, it is pushed laterally out of the machine through the slot 283 by pushing means such as indicated at 285. This pushing means comprises an air cylinder 287 mounted on the right side plate 3 of the machine and extending outward therefrom between stations 5 and 6. This cylinder has a piston rod 289 extending from a piston (not illustrated) in the cylinder through an opening 291 in the plate 3, the piston rod having a pusher head 293 at its inner end engageable with the right end of a completed shingle. The piston rod 289 is normally retracted in the cylinder 287, and the head 293 is normally in the retracted position illustrated in dotted lines in Fig. 19 in which it is located to the right of the right edge of the strip material S. Upon completion of a shingle, the cylinder 287 is operated to extend the piston rod 289, thereby to push the shingle to the left of the machine and through the slot 283. Mounted on the outside of the left side plate 1 above and below the slot 283 are soft rubber feed rollers 295 and 297 which are continuously driven by any suitable means, such as an electric motor (not shown) and a chain and sprocket drive 299 to feed shingles out of the machine.

'Ihe air cylinders 129, 139, 171 and 181 are under the control of a conventional solenoid valve (not shown) operated by a switch 301, controlled by a cam 303 on under the control of a conventional' solenoid valve (not shown) operated by a switch 305 controlled by a cam 307 on shaft 97'. The air cylinders 253, 275 and 287 are under the control of conventional solenoid valves (not shown) operated by switches 309, 311 and 313 controlled by cams 315, 317 and 319 on shaft 97.

Operation is as follows:

The shaft 97 is continuously driven to effect reciprocation of the punch press and strip-feeding unit 5 between stations 1 and 2, with downward movement of the head plate 51 during a dwell interval at station 1, and upward movement of the head plate 51 during a dwell interval at station 2. Starting at station 1 with the head plate 51 of the unit 5 raised, a cycle of the machine involves first the downward movement of the head plate 51 (during the dwell at station 1) to punch out the notches 7, 11 and 13 in the strip S, to form the indentations 9, to punch the holes 17 in the tab 15 .dened by the notches 11 and 13. Then, with the head plate 51 down and clamping the stnp against the platen 83, the unit 5 moves bodily forward to station 2, thereby feeding forward that length of the strip S required to produce one shingle. Then unit 5 dwells momentarily at station 2, the head plate 5l is raised, and then the unit 5 is returned rearward to station -1 with head `plate 5,1 raised above the v,strip S so that the strip is released.

When unit 5 reaches station 2 and .completes Aforward feed of the strip, cylinders 153 and 1,6,3arle operatedV` to move the strip-clamping bar 1,159 don/:n and Slip. clamping bar 169 up into .engagement with the strip, thereby to prevent the strip fromY being moved rearward by the unit when it returns-from station 2 to .station 1 Cam 307, which controls switch 305 for operating the solenoid valve for .cylinders I153 and 16,3, iS developed and phased so that cylinders 153 and 163 are operated to advance the bars A'159 and 169 when unit 5 completes a forward stroke and to retract the bars y1-59 and 169 when unit 5 completes a return stroke. During the return stroke of unit 5, the Vertical cylinders 129 and 139 are operated to move bending blade 135 down and bending blade 145 up to bend down the end portion 21 and to bend up the end portion 23 of the part o f the strip which lies between stations 3 and 4 (see Fig. 8). At the same time, the cylinders 171 and 181 are operated to move bending blades 177 and 187 inward to complete the bending of the portions 21 and 23 of the part of the strip between stations 4 and 5 (see Fig. 11). Cam 303, which controls switch 301 for ,operating the solenoid valve for cylinders 129, 139, 171 and 1'81, is developed and phased so that these cylinders are operated to advance and then retract the bending blades 135, 145, 177 and 187 after the strip-clamping bars 159 and 169 have been operated and before unit 5 completes a return stroke. Also during the return of unit 5 (while the strip is clamped by bars 159 and 169), the cutting and bending blade 197 of the unit 27 is driven downward to shear the strip off at station 5 against the forward edge of the blade 205 and to bend down the rear margin of the cut-off portion of the strip around the blade 209, and then the bending blade 217 swings forward to make the shingle butt hook 29 (see Figs. 13 and 14). The cam grooves 195 and 221 are developed and phased so that the operation of blades 197 and 217 and their return to retracted position occur during the return of unit 5 and so that blade 197 is down when blade 217 swings forward. Also during the return of unit 5, the cylinder 253 is operated to retract piston rod 259 and swing the blade 245 from its retracted position shown in Fig. 16 to its operative position shown in Fig. 18. Following this, the cylinder 275 kis operated to drive the rack 271 forward and rotate the bar 263 around from its retracted Fig. 16 position to its Fig. 18 position thereby to bend the forward end portion of the strip material around the blade 245 to form t .e top hook member 33 (having the indentations 9 therein) and to bend over and atten down the tab 15. 'I'hen the cylinder 253 operates to advance piston rod 259 and to push the blade 245 back to the Fig. 16 position, cylinder 275 is operated to retract the rack 271 and rotate bar 263 back to the Fig. 16 position, and then cylinder 287 is operated to push out the finished shingle. Cams 315, 317 and 319 which control switches 309, 311 and 313 for operating the solenoid valves for cylinders 253, 275 and 287 are developed and phased for carrying out these operations in the stated sequence and during the return stroke of unit 5.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As various changes could be made in the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shallk be interpreted as illustrative and not in a limiting sense.

I claim: i

1. A machine for making lrectangular sheet metal shingles, of a type having integral hook members along all four edges, from a continuous strip of sheet metal, comprising means for forming notches at the side edges of the strip and for intermittently feeding the notched strip forward a predetermined amount in a straight-line path, means forward of the notching means located at the sides of said path operable while the strip is at rest between feeding intervals for bending over side portions of the strip between notches to form the hooks for two opposite edges of ashingle, means forward of said bending means extending across said path operable while the strip is at rest between feeding intervals for cutting the strip on a transverse line extending from a notch at one side edge of the strip to a notch at the other side edge of the strip and for bending the rearward margin of the cut-off portion of the strip to form the hook for a third edge of a shingle, and means forward of said cutting means extending across said path and spaced from said cutting means a distance corresponding to said predetermined amount of strip feed operable while the strip is at rest between feeding intervals for bending the forward end margin of the strip to form ,the hook for the fourth edge of a shingle.

2. A machine as set forth in claim 1 further comprising means for feeding completed shingles laterally out of the machine.

3. A machine as set forth in claim 1 wherein the bending means for forming the hooks for the said two opposite edges of `a shingle comprises a first bending unit for -bending one side portion of the strip between notches to extend at right angles to the strip in one direction and the other side portion of the str ip vbetween notches to extend at right angles to the strip in the opposite direction, and a second bending unit spaced forward from the irst a distance corresponding to said predetermined amount of strip feed for completing the bending of said side portions.

4. A machine as set forth in claim l wherein the means for cutting the strip and bending to form the hook for the Said third edge of a shingle comprises fixed spaced rearward and forward plates, a blade movable between the fixed blades for shearing the strip against the rearward blade and bending the rearward margin of the cut-off portion of the strip around the rearward edge of the forward blade, and a bending bar movable for bending forward the bent-down rearward margin of the cut-off portion of the strip.

5. A machine as set forth in claim l wherein the means for bending the forward end margin of the strip to form the hook for the said fourth edge of a shingle comprises .a blade movable against the strip and a bar swingable.

around this blade.-

6. A machine for making rectangular sheet metal shingles, of a type having integral hook members along their top, bottom and ends, from a continuous strip of sheet metal. comprising a punch press reciprocable between a rst station and a second station adapted to form notches at the side edges ofthe strip at the rst statlon and to clamp the strip for intermittently feeding it forward in a straight-line path a predetermined amount corresponding to the height of a shingle plus thewidth of the top and bottom hooks upon forward movement of the press from the tirst to the ysecond station; the press being opened to release the strip upon return to the first station, means for clamping the strip against reverse movement upon return of the press, means forward of the press located at opposite sides of said path operable while the strip is at rest between feeding intervals for bending over side portions of the strip between notches to form the end hooks of a shingle, means forward of said bending means extending across said path operable while the strip is at rest between feeding intervals for cutting `the strip on a transverse line extending from a notch at one side edge of the strip to a notch at the other side edge of the strip and for bending the rearward margin of the cut-oil? portion of the strip to form the bottom hook of a shingle, and means forward of said cutting means extending across said path and spaced from said cutting means a distance corresponding to said predetermined amount of strip feed operable while the strip is at rest between feeding intervals for bending the forward end margin of the strip to form the top hook for a shingle.

7. A machine as set forth in claim 6 further comprising means for pushing completed shingles endwise and feeding them laterally out of the machine.

8. A machine as set forth in claim 6 wherein the bending means for forming the end hooks comprises a rst bending unit for bending one side portion of the strip between notches up and the other side portion of the strip between notches down, and a second bending unit spaced forward from the irst a distance corresponding to said predetermined amount of strip feed for completing the bending of said side portions.

9. A machine as set forth in claim 6 wherein the means for cutting the strip and bending to form the bottom hook for a shingle comprises fixed spaced rearward and forward blades, a blade movable down between the fixed blades for shearing the strip against the rearward blade and bending down the rearward margin of the cut-off portion of the strip around the rearward edge of the forward blade, and a bending bar movable under the forward blade to bend forward the bent-down rearward margin of the cut-off portion of the strip.

10. A machine as set forth in claim 6 wherein the means for bending the forward end margin of the strip to form the top hook for a shingle comprises a blade movable down on the strip and a bar swingable up around this blade.

References Cited in the ijle of this patent UNITED STATES PATENTS 318,088 Cooper May 19, 1885 341,527 Whitlatch May 11, 1886 1,142,493 Clark June 8, 1915 1,167,073 House Ian. 4, 1916 2,659,406 Locke Nov. 17, 1953 

